PrinciplesOfProductDevelopmentFlow.ControllingFlowUnderUncertainty

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F1:    The Principle of Congestion Collapse
  • When loadinb becomes too high, we will see a sudden and catastrophic drop in output

F2:    The Peak Throughput Principle
  • Control occupancy to sustain high throughput in systems prone to congestion

F3:    The Principle of Visible Congestion
  • Use forecasts of expected flow time to make congestion visible

F4:    The Principle of Congestion Pricing
  • Use pricing to reduce demand during congested periods

F5:    The Principle of Periodic Resynchronization
  • Use a regular cadence to limit the accumulation of variance

F6:    The Cadence Capacity Margin Principle
  • Provide sufficient capacity margin to enable cadence

F7:    The Cadence Reliability Principle
  • Use cadence to make waiting times predictable

F8:    The Cadence Batch Size Enabling Principle
  • use a regular cadence to enable small batch sizes

F9:    The Principle of Cadenced Meetings
  • Schedule frequent meetings using a predictable cadence

F10:    The Synchronization Capacity Margin Principle
  • To enable synchronization, provide sufficient capacity margin

F11:    The Principle of Multiproject Synchronization
  • Exploit scale economics by synchronizing work from multiple projects

F12:    The Principle of Cross-Functional Synchronization
  • Use synchronized events to facilitate cross functional trade-offs

F13:    The Synchronization Queueing Principle
  • To reduce queues, synchronize the batch size and timing of adjacent processes

F14:    The Harmonic Principle
  • Make nested cadences harmonic multiples

F15:    The SJF Scheduling Principle
  • When delay costs are homogeneous, do the shortest job first

F16:    The HDCF Scheduling Principle
  • When job durations are homogeneous, so the high cost-of-delay job first

F17:    The WSJF Scheduling Principle
  • When job durations and delay costs are not homogeneous, use WSJF (weighted shortest job first)

F18:    The Local Priority Principle
  • Priorities are inherently local

F19:    The Round-Robin Principle
  • When task duration is unknown, time-share capacity

F20:    The Preemption Principle
  • Only preempt when switching costs are low

F21:    The Principle of Work Matching
  • Use sequence to match jobs to appropriate resources

F22:    The Principle of Tailored Routing
  • Select and tailor the sequence of subprocesses to the task at hand

F23:    The Principle of Flexible Routing
  • Route work based on the current most economic route

F24:    The Principle of Alternate Routes
  • Develop and maintain alternate routes around points of congestion

F25:    The Principle of Flexible Resources
  • Use flexible resources to absorb variation

F26:    The Principle of Late Binding
  • The later we bind demand to resources, the smoother the flow

F27:    The Principle of Local Transparency
  • Make tasks and resources reciprocally visible at adjacent processes

F28:    The Principle of Preplanned Flexibility
  • For fast responses, preplan and invest in flexibility

F29:    The Principle of Resource Centralization
  • Correctly managed, centralized resources can reduce queues

F30:    The Principle of Flow Conditioning
  • Reduce variability before a bottleneck

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